AP World History: Modern, AP exams, 8–10%

Unit 2: Networks of Exchange (c. 1200 to c. 1450)

Unit 2 traces the trade networks that linked Afro-Eurasia before 1450 and the cultural, biological, and technological consequences of that connection. The Silk Roads, Indian Ocean, and trans-Saharan routes are treated as systems with causes and effects, not lists of goods. Environmental consequences such as the spread of the Black Death matter as much as commerce.

Position: 2 of 9 units
Published weighting: 8–10% in the official framework
Topics covered: 6 topics in this guide

What is covered

Topics inside this unit.

These topics describe the scope students most often review for this part of AP World History: Modern. Treat them as a study checklist rather than an exhaustive list of what a single exam form can sample.

The Silk Roads: Caravanserai, credit and money innovations, and the growth of trading cities along the overland routes.
The Mongol Empire and Eurasian connection: Conquest and administration, the Pax Mongolica, and the transfer of technology and ideas across Eurasia.
Exchange in the Indian Ocean: Monsoon-driven trade, diasporic merchant communities, and the growth of Swahili and Southeast Asian port cities.
Trans-Saharan trade routes: Camel caravans, gold and salt exchange, and the spread of Islam into West African states.
Cultural consequences of connectivity: Diffusion of religions, literary and scientific transfer, and the growth of cosmopolitan trading cities.
Environmental consequences of connectivity: Crop diffusion such as Champa rice, and the spread of the plague along the same routes that carried goods.

Study tips

How to practice Networks.

Section-specific guidance that follows from how this material is usually tested.

Draw the three major networks on a blank map until routes, hubs, and goods come from memory.
For each network, name one cultural and one environmental effect; these pairs answer many stimulus questions.
Practice a causation short answer on the Mongols, a favorite target for both continuity and change prompts.

Where this fits

Unit 2: Networks of Exchange (c. 1200 to c. 1450) is 2 of 9 units in the AP World History: Modern guide, and it carries a published weighting of 8–10% in the official framework. Use the full guide to balance it against everything else you have to review.

Back to the AP World History: Modern guide Official exam information

Sample Networks questions

Practice questions, not yet expert-reviewed

Original practice questions written to the published framework for this section. No expert has reviewed them, and they are not taken from any official exam. Try each one before you open the answer.

Question 1Foundational
Which network of overland routes carried silk, porcelain, and ideas between China and the Mediterranean, supported by roadside inns called caravanserai?
1. AThe Silk Roads
2. BThe Indian Ocean network
3. CThe trans-Saharan routes
4. DThe Grand Canal
Show answer
Answer: A. The Silk Roads
Caravanserai, credit instruments such as bills of exchange, and pack animals let goods and ideas move in stages across Central Asia. The trans-Saharan routes are the tempting distractor because they also depended on caravans, but they linked West Africa to North Africa across the desert rather than China to the Mediterranean.
Key insight: Trade routes are systems with infrastructure, not lines on a map; the inns and credit are what made distance workable.
Question 2Foundational
Which seasonal wind pattern made long-distance sailing across the Indian Ocean predictable enough to sustain regular trade?
1. AThe monsoon winds
2. BThe Gulf Stream
3. CThe Atlantic trade winds
4. DThe jet stream
Show answer
Answer: A. The monsoon winds
Monsoon winds blow one direction in summer and reverse in winter, so merchants could time voyages and wait out the season in foreign ports, which built lasting diasporic merchant communities. The Atlantic trade winds are the tempting distractor because they served a similar function, but they shaped Atlantic rather than Indian Ocean voyaging.
Key insight: Environment set the schedule of Indian Ocean commerce, and long port stays created mixed merchant communities.
Question 3Intermediate
Which fast-ripening rice variety, introduced from Vietnam, allowed two harvests a year and helped drive rapid population growth in Song China?
1. AChampa rice
2. BBasmati rice
3. CSorghum
4. DCassava
Show answer
Answer: A. Champa rice
Champa rice matured quickly and tolerated drier fields, so farmers in southern China could double crop, and the resulting surplus fed growing cities and a commercial economy. Cassava is the tempting distractor because it also raised food supplies dramatically, but it is an American crop that reached Afro-Eurasia only after 1492.
Key insight: Crop diffusion is an environmental consequence of connectivity, and it usually shows up as population growth.
Question 4Intermediate
Which pandemic spread along Eurasian trade routes in the mid-fourteenth century and killed a large share of the population of Europe, Southwest Asia, and North Africa?
1. AThe Black Death
2. BThe influenza pandemic of 1918
3. CCholera
4. DThe smallpox epidemics of the Americas
Show answer
Answer: A. The Black Death
Plague moved with merchants, armies, and rodents along the same routes that carried goods, so the most connected regions suffered the heaviest losses. The smallpox epidemics of the Americas are the tempting distractor because they were also catastrophic, but they followed 1492 and belong to the Columbian Exchange rather than to Eurasian trade networks.
Key insight: Connection carries disease as reliably as it carries goods, a pattern that repeats in 1492 and again in the modern era.
Question 5Advanced
What term describes the period of relative stability under Mongol rule that made travel across Eurasia safer and encouraged exchange among China, Persia, and Europe?
1. AThe Pax Mongolica
2. BThe Pax Romana
3. CThe Pax Britannica
4. DThe Hanseatic League
Show answer
Answer: A. The Pax Mongolica
Under one overarching authority, merchants, envoys, and travelers moved across Eurasia, and technologies including gunpowder and printing spread westward. The Pax Romana is the tempting distractor because it names the same idea of imperial peace, but it describes the early Roman Empire more than a thousand years earlier.
Key insight: The Mongols are the classic causation question: destruction in conquest, then intensified exchange under their rule.

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Unit 2: Networks of Exchange (c. 1200 to c. 1450)